ZSM-5 in catalytic cracking: Riser pilot plant gasoline composition analyses

Conference · Wed Aug 01 00:00:00 EDT 1990 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States)

OSTI ID:6969255

Pappal, D A ^[1]; Schipper, P H ^[2]

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1. Mobil Research and Development Corp., Paulsboro, NJ (United States)
2. Mobil Research and Development Corp., Princeton, NJ (United States)

ZSM-5, Mobil's proprietary shape-selective zeolite, has been used commercially in synthetic fuels (methanol-to-gasoline), petrochemicals (xylene isomerization, toluene disproportionation, benzene alkylation) and in petroleum refining (lube and distillate dewaxing). Using these examples, Chen and Garwood have demonstrated the shape selective behavior of this catalyst. In the dewaxing process, for example, ZSM-5 preferentially cracks the straight chain paraffins; substantially improves the pour and cloud points while retaining high distillate yields. Since 1983, ZSM-5 has been used in catalytic cracking to increase both the research and motor octanes and the production of light olefins. These olefins can then increase the yields of alkylate, MTBE and TAME. ZSM-5 accomplishes this by upgrading low octane components in the gasoline boiling range (C{sub 7}-C{sub 10} hydrocarbons) into light olefins (C{sub 3}, C{sub 4}, C{sub 5}). It also increases the concentration of C{sub 4} and C{sub 5} branched olefins. Since its introduction in 1983, ZSM-5 has been used in over 10% of the free world's cracking capacity. The yield shifts from this study indicate minimal shifts in total paraffin yield but a distinct increase in iso/normal ratio for both catalysts when ZSM-5 is added. In general the higher molecular weight olefins decrease with an increase in the lower molecular weight olefins. The iso/linear olefin ratio increases with ZSM-5 added for both catalysts in the C{sub 5} and C{sub 6} carbon number range. The increase in iso/normal aliphatics translates into a very selective increase in motor octane for both catalysts.

• OSTI ID: 6969255
• Report Number(s): CONF-900802--
• Journal Information: American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States), Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States) Vol. 35:4; ISSN 0569-3799; ISSN ACPCA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ADDITIVES
ALKANES
ALKENES
ALKYLATED AROMATICS
AROMATICS
BENZENE
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CONTROL
CRACKING
DECOMPOSITION
ENERGY SOURCES
FAUJASITE
FOSSIL FUELS
FUEL ADDITIVES
FUELS
FUNCTIONAL MODELS
GASOLINE
HYDROCARBONS
INDUSTRIAL PLANTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KNOCK CONTROL
LIQUID FUELS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
PETROCHEMICALS
PETROLEUM
PETROLEUM PRODUCTS
PETROLEUM REFINERIES
PILOT PLANTS
PROCESSING
PYROLYSIS
REFINING
SILICATE MINERALS
SYNTHESIS
SYNTHETIC FUELS
THERMOCHEMICAL PROCESSES
TOLUENE
YIELDS
ZEOLITES